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(4} Core Tests. A minimum number of mortar test specimens equal to the number of <br />required cores shall be prepared from the cores and tested as specified herein. The <br />mortar joint of the outer wythe of the masonry core shall be tested in shear by <br />placing the circular core section in a compression testing machine with the mortar <br />bed joint rotated I S degrees from the axis of the applied load. The mortar joint <br />tested in shear shall have an average ultimate stress of 20 psi based on the gross <br />area. The average shall be obtained from the total number of cores made. If test <br />specimens cannot be made from cores taken, then the shear value shall be reported <br />as zero. <br />(f) Testing of Shear Bolts. One-fourth of all new shear bolts and dowels embedded in <br />unreinforced masonry walls shall be tested by a special inspector using a torque calibrated <br />wrench to the following minimum torques: <br />2" diameter bolts or dowels = 40 foot-lbs. <br />5/8" diameter bolts or dowels = 50 foot-lbs. <br />3/4" diameter bolts or dowels = 60 foot-lbs. <br />No bolts exceeding 3/4" shaI1 be used. All bolt heads and nuts shall be installed over <br />malleable iron or plate washers when bearing on wood and heavy cut washers when <br />bearing on steel. <br />(g) Determination of Allowable Stresses for Design Methods Based on Test Results. <br />(1) Design Shear Values. Design seismic in-plane shear stresses shall be <br />substantiated by tests performed as specified in subsection (e) (3) and (4), above. <br />Design stresses shall be related to test results obtained in accordance with Table 5 <br />of this Article. Intermediate values between 3 and 10 psi maybe interpolated. <br />(2) Design Compression and Tension Values. Compression stresses for unreinforced <br />masonry having a minimum design shear value of 3 psi shall not exceed 100 psi. <br />Design tension values for unreinforced masonry shall not be permitted. <br />(h) Five percent of the existing rod anchors utilized as all or part of the required wall anchors <br />shall be tested in pullout by an approved testing laboratory. The minimum number tested <br />shall be four per floor, with two tests at walls with joists framing into the wall and two <br />tests at walls with joists parallel to the wall. The test apparatus shall be supported on the <br />masonry wall at a minimum distance of the wall thickness from the anchor tested. The <br />rod anchor shall be given a preload of 300 lbs. prior to establishing a datum for recording <br />elongation. The tension test load reported shall be recorded at one-eighth inch relative <br />movement of the anchor and the adjacent masonry surface. Results of all tests shall be <br />reported. The report shall include the test results as related to the wall thickness and joist <br />